Robust Atom/RSS feed generator

[novoid]

With my simple Atom/RSS feed generating code, I often had issues with some Atom/RSS aggregators in combination with special characters, encoding, and such. Images don't work so far within Atom/RSS feeds.

Maybe somebody want to volunteer to add a decent Atom/RSS support that generates rock solid Atom/RSS feeds so that people might follow the "full content" feed and not the "link only" feed which I am forced to recommend.

• remove recommendation for simple feed

[novoid]

Main issues I could identify so far were related to HTML snippets from Twitter and Youtube.

[novoid]

Current feed is broken again.
Can be verified via Thunderbird (stefan2904 reported issue) or W3C Validator:

This feed does not validate.

    line 216, column 151: XML parsing error: <unknown>:216:151: not well-formed (invalid token) [help]

        ... up/ghxrq87/?utm_source=reddit&utm_medium=web2x&amp;context=3">this reddi ...
                                                     ^

In addition, interoperability with the widest range of feed readers could be improved by implementing the following recommendations.

    line 5, column 99: Self reference doesn't match document location [help]

        ... g-all.atom_1.0.links-and-content.xml" />
                                                     ^

    line 7, column 26: Identifier "http://Karl-Voit.at/" is not in canonical form (the canonical form would be "http://karl-voit.at/") (2 occurrences) [help]

          <id>http://Karl-Voit.at/</id>
                                  ^

[stefan2904]

@novoid I think merging of PR #58 accidentally closed this issue ... I don't think the PR fixes the overall robustness problems. ;-)

[novoid]

Thanks @stefan2904 ,

I had to revert your commits because it resulted in unwanted replacements such as < to <.

Note to myself: there is no distinction between HTML-content for the feeds and the blog articles. Therefore, with the current approach, there are following possibilities:

1. Parse the generated feed data and do a smart search & replace of the characters like multiple "&" within URLs only.
   • Would require: list of characters to replace (and which cause errors); a parser which results only in replacements that are necessary.
2. Another attempt to switch to CDATA for the feeds
3. Evaluate and integrate any external feed library (a dependency I would like not to have when possible).